Flyback Transformers (2.7 – 36 Vdc input)

Input range:  Telecom (36 – 72 Vdc)  |  Telecom (36 – 57 Vdc)  |  Telecom extended (14 – 72 Vdc)  |  AC line

If no transformer meets your design criteria, consult the Coilcraft Structured Design Guide for Switching Transformers for a step-by-step guide to transformer design, or contact Coilcraft for assistance.
3.3  Vdc Input
1.2 12 V, 0.1 A 330 1 : 2 100 DA2420-AL ST Micro STE12PS
1.2 12 V, 0.1 A 330 1 : 2 100 DA2421-AL ST Micro STE12PS
4 – 6  Vdc Input
4.2 12 V, 0.35 A
–12 V, 0.35 A		 22 1 : 2.5
1 : 2.5		 100 Q4436-BL NSC LM258X (T2)
4.2 12 V, 0.35 A
–12 V, 0.35 A		 22 1 : 2.5
1 : 2.5		 100 Q4337-BL NSC LM258X (T2)
4.5 5 V / 0.9 A 47 1 : 1 100 S6057-AL NSC LM258X (T7)
4.5 5 V / 0.9 A 47 1 : 1 100 S6000-AL NSC LM258X (T7)
8.0 5 V, 1.6 A 22 1 : 1 100 Q4435-BL NSC LM258X (T1)
8.0 5 V, 1.6 A 22 1 : 1 100 Q4434-BL NSC LM258X (T1)
4.5 – 8.5  Vdc Input
4.0 –48 V, 0.083 A 19 1 : 16 125 FA2469-AL STMicro STLC3075
5 – 24  Vdc Input
18.0 5 V, 3.6 A
15 V, 1.2A
–15 V, 1.2A		 7.5 1 : 0.5
1 : 1.5
1 : 1.5		 100 HA3994-AL Linear LT3751 Cap. Charger
8.5 – 12  Vdc Input
4.0 –48 V, 0.083 A 19 1 : 8 125 FA2470-AL STMicro STLC3075
9 – 20  Vdc Input
4.1 24 V, 0.17 A
72 V, 0.17 A		 6 1 : 3
1 : 9		 600 IFLY0012L Intersil ISL6401 
10 – 14  Vdc Input
5 3.3 V, 1.5 A 25 1 : 0.14 250 GA3431-BL Linear LT3573
5 5.0 V, 1.0 A 25 1 : 0.20 250 GA3430-BL Linear LT3573
18 – 36  Vdc Input
7.6 12 V,  0.63 A
–12 V, 0.63 A		 65 1 : 1.2
1 : 1.2		 100 Q4438-BL NSC LM258X (T6)
7.6 12 V,  0.63 A
–12 V, 0.63 A		 66 1 : 1.2
1 : 1.2		 100 Q4339-BL NSC LM258X (T6)
9.0 12 V,  0.75 A
–12 V, 0.75 A
 5 V, 3 A		 85 1 : 0.35
1 : 0.8
1 : 0.8		 100 Q4344-BL NSC LM258X (T4)
9.0 5 V, 1.8 A
12 V, 0.25 A
–12 V, 0.25 A		 55 1 : 0.5
1 : 0.167
1 : 0.167		 100 Q4437-BL NSC LM258X (T5)
9.0 5 V, 1.8 A
12 V, 0.25 A
–12 V, 0.25 A		 66 1 : 0.5
1 : 0.167
1 : 0.167		 100 Q4338-BL NSC LM258X (T5)
16.8 12 V, 1.4 A
–12 V, 1.4 A		 85 1 : 0.8
1 : 0.8		 100 Q4343-BL NSC LM258X (T3)
20 – 28  Vdc Input
5 3.3 V, 1.5 A 24 1 : 0.25 250 GA3429-BL Linear LT3573
22 – 26  Vdc Input
50 53 V, 1.0 A 35 1 : 1.4 150 GA3136-BL TI UCC2809